What is GD&T Evaluation?
Geometric Dimensioning and Tolerancing (GD&T) Evaluation is a specialized inspection service focused on verifying that manufactured parts meet the precise geometric requirements defined on engineering drawings and 3D models. GD&T utilizes a symbolic language to communicate allowable variation in form, orientation, location, and runout, ensuring functional fit and interchangeability in assemblies.
ACTCO Metrology’s GD&T Evaluation service provides comprehensive measurement and analysis to confirm that your components conform to even the most complex tolerancing schemes.
Technology & Equipment for GD&T Evaluation
ACTCO Metrology leverages state-of-the-art inspection equipment and software to deliver precise, reliable GD&T evaluations.
EVOLVE SmartProfile™ |
Inputs: CAD files in SFM™, IGES, VDAFS, STL, DXF, STEP, MVS, SPP, QIF. Measured data from virtually any device. Analysis: Evaluates surface profiles and geometric tolerances against Datum Reference Frames. Supports compound and pattern datums, MMC/LMC, non-fully constrained degrees of freedom, and composite tolerance zones. Outputs: Reports in PDF, Excel, text, and HTML formats. |
Why Choose ACTCO Metrology for GD&T Evaluation?
- Experience: Over 36 years in dimensional metrology, with advanced staff averaging 20+ years of hands-on expertise.
- Comprehensive Reporting: Every GD&T evaluation includes a detailed, signed report package with bubbled blueprints, uncertainty statements, and optional statistical analysis.
- Customization: We can tailor reporting formats and data presentations to your or your customer’s specific requirements.
- Measurement Integrity: Annual proficiency testing and regular equipment calibration ensure consistent, accurate results.
Frequently Asked Questions
Do you perform GD&T?
Yes, Actco performs all of the GD&T applications. What we find, however, is that 95% of our customers have "not" learned the actual usage of this requirement. The basic "S.A.M." principle always applies to positioning call-outs. That stands for Sit on, Align to, and Measure to. Most customers just put A-B-C and let it go, and we then need to try and determine just what the customer really is looking for. You cannot measure to a "PLANE", but you need a "FEATURE" instead.
How do you report GD&T?
How about PROFILES?